<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <link href="css/bootstrap.css" rel="stylesheet">
    <style>
        body{
            margin: 50px;
        }
    </style>
</head>
<body>

<!----按钮----->
<button class="btn btn-danger" style="width: 250px;">我是按钮</button>
<button class="btn btn-warning">我是按钮</button>
<button class="btn btn-success">我是按钮</button>

<!--面板-->
<div class="panel panel-danger">
    <div class="panel-heading">不好了，出大事了！！！</div>
    <div class="panel-body">我不小心烧到了！！！</div>
</div>

<!--徽章-->
<i class="badge" style="background-color: red;">10</i>
<i class="badge" style="background-color: red;">我是MT</i>
<i class="badge" style="background-color: blue;">haha</i>

<!--进度条-->
<div class="progress">
    <div class="progress-bar progress-bar-striped active" role="progressbar" aria-valuenow="45" aria-valuemin="0" aria-valuemax="100" style="width: 45%">
        <span class="sr-only">45% Complete</span>

    </div>
</div>

<!--字体图标-->
<span class="glyphicon glyphicon-music" style="font-size: 550px;color: red"></span>
</body>
</html>